08-16-2011, 10:42 AM
Join Date: Jun 2009
Location: Bryan, TX
iTrader Positive Rating: 100%
| | Re: Something new
3.3 wpg is a lot light for a large tank, but I don't dose CO2. I had a 125 that did wonderfully with 156 watts of T5-HO over it, and I tried lighting in the 234-312 watt range over the same tank and usually encountered algae over the 1.8 wpg range (I use much higher lighting in my small tanks). But again, this was non-CO2.
Since you don't seem to be going the NPT route, I can't recommend a substrate with confidence, but I have used well-rinsed sand in one tank and Black-Diamond brand blasting grit in two others with great results as a substrate cap (using a yard soil - potting mix underlayer).
Good luck with the scape; the dimensions seem very nice for a nature-themed layout.